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padboll · 08-14-2010, 02:24 PM

I never had a possibility to test a GrandStream, but all hardware I tested until now are quite similar.
For now, just some items:
1) You set "true" to "NAT Traversal (STUN)" but did not configure the STUN server according to end of first paragraph. I would say: If your admin is not so skilled, you may have chance to be in a non-symmetric NAT and then use STUN.
So, use the STUN server stun.voxalot.com

2) Don't use outbound proxy if it is not really needed. But If you telle that outbound calls are ok, don't change it for now.

3) Use us.voxalot.com as SIP/REGISTRAR (or "Proxy" according to some hardware, but this is not the same as "outbound proxy"). I got similar issues when I misspelled the server to "voxalot.com" in place of "eu.voxalot.com". Everything was ok for outbound, but I was unreachable for inbound.

If you are not in a symmetric (or NAPT) network but just a "simple" one, it should work just fine with STUN. (No need to open ports, so no security risk on this side.)

08-14-2010, 02:24 PM	#2
padboll Member Join Date: Dec 2006 Location: Belgium Posts: 40 Thanks: 4 Thanked 1 Times in 1 Posts	I never had a possibility to test a GrandStream, but all hardware I tested until now are quite similar. For now, just some items: 1) You set "true" to "NAT Traversal (STUN)" but did not configure the STUN server according to end of first paragraph. I would say: If your admin is not so skilled, you may have chance to be in a non-symmetric NAT and then use STUN. So, use the STUN server stun.voxalot.com 2) Don't use outbound proxy if it is not really needed. But If you telle that outbound calls are ok, don't change it for now. 3) Use us.voxalot.com as SIP/REGISTRAR (or "Proxy" according to some hardware, but this is not the same as "outbound proxy"). I got similar issues when I misspelled the server to "voxalot.com" in place of "eu.voxalot.com". Everything was ok for outbound, but I was unreachable for inbound. If you are not in a symmetric (or NAPT) network but just a "simple" one, it should work just fine with STUN. (No need to open ports, so no security risk on this side.)